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Finding the Fourth Proportional to 18,781.98, 25,918.33 and 10,283.95

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Solution

The fourth proportional to 18,781.98, 25,918.33 and 10,283.95 is: 14,191.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,781.98 : 25,918.33 = 10,283.95 : x
  2. Step 2: Convert to fraction form
    18,781.98/25,918.33 = 10,283.95/x
  3. Step 3: Cross multiply
    18,781.98x = 25,918.33 × 10,283.95
  4. Step 4: Simplify right side
    18,781.98x = 266,542,628.79
  5. Step 5: Solve for x
    x = 266,542,628.79/18,781.98
  6. Step 6: Final answer
    x = 14,191.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.